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X402 Web Extraction - Structured Field Extractor
x402
X402 Web Extraction - Structured Field Extractor is a paid API for AI agents from x402.feld-feder.at, paid per call via x402, $0.01/call, status down (last checked 2026-10-22).
Extracts structured data fields from a web page URL using CSS or XPath selectors, returning named field values as arrays of strings.
Price / call$0.01
Success—
StatusDown
How this service works
Pay-per-request data tools for AI agents.
Output
A JSON object with an 'ok' boolean and a 'data' object containing a 'fields' array. Each element in the array has a 'name' (matching the requested field name) and a 'values' array of strings containing all matched content for that selector. May also include cache metadata indicating whether the result was served from cache and its age.
Example use cases
E-commerce price and title scraping
“Go to https://www.example-shop.com/product/widget-pro and extract the product name using the CSS selector 'h1.product-title' and the price using '.price-now', and return them as fields named 'product_name' and 'price'.”
News article metadata extraction
“Scrape https://techcrunch.com/2024/01/15/some-article/ and pull out the article headline using the CSS selector 'h1.article__title' and the author name using 'div.article__byline a', returning them as 'headline' and 'author'.”
Job listing details extraction
“From the job posting at https://jobs.example.com/posting/12345, extract the job title using XPath '//h1[@class="job-title"]' and the salary range using XPath '//span[@data-field="salary"]', and give me the results as 'job_title' and 'salary'.”
Technical details
Endpoint
POSThttps://x402.feld-feder.at/v1/web/extract?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to extract specific named fields from a known web page URL using precise CSS or XPath selectors, and you want structured, machine-readable output per field. Prefer this over general web search when you already know the page URL and the DOM structure. Best for structured scraping tasks where selector-based extraction is reliable (static HTML pages). Not suitable for JavaScript-heavy SPAs or full-page crawling.
Side effects
- URL unreachable or returns non-200 status — field values may be empty or error returned
- Selector matches no elements — field returned with empty 'values' array
- Malformed CSS or XPath selector — request rejected with validation error
- URL exceeds 4096 character limit — request rejected
- More than 100 fields requested — request rejected
- Payment of $0.01 USDC not provided or rejected — 402 Payment Required response
- Webpage requires JavaScript rendering — static extractor may miss dynamically loaded content
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"data": {
"fields": []
}
}
}Tags
x402
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